On tJie Generic Position of Btnson^n Helix hyba. 55 



does occur. I obtained my specimens in May and June, and 

 they bore numerous o-onophores. 



In studying- Wrightia and the allied genera one cannot help 

 noticing- their resemblance to Calyptoblasts. The family 

 Bougainvilliidse, to which they belong, is practically alone 

 among- Gymnoblastea in possessing a single verticil of filiform 

 tentacles surrounding a conical hypostome. All the Calypto- 

 blasts have this conical hypostome and single verticil of 

 filiform tentacles. Further, many of the genera of Bougain- 

 villiidse have quite a distinct protective cup for the hydranth, 

 resembling'greatly tliehydrothecaof theCalyptoblast. Indeed, 

 were it not for the fact that these genera are classified with 

 the Gymnoblastea, their protective cups would receive the 

 name of hydrothecte. 



These facts point to the conclusion that a close relationship 

 exists between the family Bougainvilliidse and the suborder 

 Calyptoblastea. The Bongainvilliilaj, perhaps, form a 

 transition-stage between the suborders Gymnoblastea and 

 Calyptoblastea. 



XI. — On the Generic Position of Benson^ s Helix hyba and 

 the Similarity of its Anatomy to that of Khasiella vidua, 

 W. T. Elan ford. By Lt.-Colonel H. H. GODWIN- AuSTEN, 

 F.R.S. &c." 



Ever since the discovery of this species about 1860 it has 

 been im|)Ossib!e to locate it in any Indian genus without 

 considerable doubt. It is apparently very rare. I have never 

 come across it in the field, and I do not thiidc it is to be 

 found in many collections. I am informed by Mr. S. F. 

 Harmer, of the University Museum of Zoology, Cambridge, 

 that two specimens (Benson's types) are in the MacAndrew 

 collection. Fortunately I have recently discovered two 

 S])ecimens among some other species preserved in spirit by 

 Mr. VV. Theobald, marked " Chamba," a small ^tate in 

 the N.W. Himalaya, S.E. of Kashmir Territory. The one 

 from which the subjoined description was taken was in a 

 very good state of preservation. All we knew with any 

 certainty was that it belonged to the Zonitidai, Mr. Theobald 

 having noted the presence of the mucous gland at the extre- 

 mity of the foot at the time of capture. 



Mr. Benson described the shell in the Ann. & ^^fag. Nat. 

 Hist. ser. 3, vol. vii. (Feb. 18Gl),in his usual excellent way, 

 and goes on to say : — 



